Ergonomic keyboard

ABSTRACT

An ergonomic keyboard having a mount and a plurality of keys arranged in a plurality of unbroken adjacent rows is provided. Each row is comprised of an arcuate portion, a left portion, and a right portion. The left and right portions extend tangentially from the left and right sides of the arcuate portion, respectively. The arcuate portion, of each row is convex to the user side of the keyboard, and at least two keys in each arcuate portion are elongated. Alphanumeric indicia on the keys can be arranged in the QWERTY pattern.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The field of the present invention is keyboards for use withcomputers, word processors, electric typewriters and the like.

[0003] 2. Description of the Prior Art

[0004] The well known keyboard design that has generally been used fortypewriters and computers has four parallel rows of keys. Each row isadjacent to another row, and the rows are located one on top of theother. The top row of keys is numeric, and the bottom three arealphabetical.

[0005] Alphanumeric indicia on the keys of the standard keyboard arearranged in a QWERTY design. “QWERTY” stands for the six letters runningfrom left to right in the top row of alphabetical keys.

[0006] The keys in each of the four rows are slightly staggered toshorten the distance the finger must travel between keys in adjacentrows. Minimizing the distance the fingers must travel is importantbecause decreased typing speeds and increased error rates result as thedistance a finger must travel from its normal, or “home,” positionincreases. Furthermore, longer strokes increase muscle strain andfatigue.

[0007] The parallel arrangement of straight rows of keys used in thetypical keyboard design requires the hands to be held in a relativelyunnatural position. Users must hold their wrists close together and turntheir hands outward. Furthermore, elbows are generally pressed againstthe body. This position forces users to strain muscles from theshoulders to the fingertips in order to keep wrists horizontal to thekeyboard and reach all the keys, causing fatigue and strain. To makematters worse, many typists, working at computer stations, positiontheir hands over the keyboard with the sensitive wrist cocked upward ordownward, compressing the tendons, ligaments and nerves that run throughthe narrow confines of the wrist.

[0008] Frequent users of standard keyboards are often afflicted with aserious repetitive stress injury (RSI) known as carpal tunnel syndrome.This disease is the long term result of irritation and inflammation ofthe median nerve and is caused by maintaining the fingers, hands,wrists, and arms in the unnatural position required to use the standardQWERTY keyboard. Carpal tunnel syndrome and other related RSI injurieshave resulted in lost productivity, rising insurance and worker'scompensation claims, and, more recently, a rise in product liabilitysuits against keyboard manufacturers.

[0009] There have been attempts to redesign keyboards to allow users toassume more natural wrist and hand positions while typing. One suchapproach has been to bend the rows of keys in the middle to form aV-shaped arrangement. This arrangement is less fatiguing because itallows operators to turn their wrists outward somewhat so that theirhands are held more directly in line with their forearms.

[0010] A problem with existing V-shaped, or “chevron”, keyboards is thatmost of them do not use the standard QWERTY key arrangement. Therefore,existing chevron arrangements must be relearned by a typist whose onlyprior training and experience is usually on QWERTY keyboards.Furthermore, many chevron keyboards have such large gaps between thekeys on alternate sides of the keyboard that they cannot be readilymodified for use by a QWERTY trained typist. Also, chevron keyboards arenot generally suitable when it is desired to minimize the typing area,for example, a laptop, notebook or pocket computer. And while thechevron design permits the wrists to be held in a more natural position,the elbows are still generally maintained close to the body because ofthe geometry of the keyboard. Thus, the upper portion of the arm andshoulders remain in a strained position.

[0011] Another general problem with V-Shaped boards of the prior art isthat they fail to prevent users from cocking their wrists upwardly ordownwardly while typing. Thus, even with V-shaped or chevron shapedkeyboards the tendons, ligaments and nerves that run through the narrowconfines of the wrist can continue to be compressed and cause theoperator to suffer RSI.

[0012] Chevron boards that have attempted to use the standard QWERTY keyarrangement have not been entirely successful. The shape of the keys inthe center section of the keyboard must be altered in specific ways toaccommodate the chevron pattern and to provide an interlockingarrangement between the rows of keys at the center, where the angle isformed. Namely, the base perimeters of three keys (the U key, the B key,and the space bar) must be formed into chevrons, and the base perimeterof four keys (the 6 key, the 7 key, the G key, and the H key) must beformed into irregular trapezoids. Increased complexity in the key shapescauses a corresponding increase in the set up costs for manufacturingthe key board. Also, the angle of finger throw in these keyboards isdifferent than that of a standard QWERTY keyboard, and no symmetryexists in the amount the keys are staggered on each side of the keyboardcenter. Thus, QWERTY-trained operators will experience increased errorrates until they gain complete tactile familiarity with the shiftedkeys.

[0013] Therefore, a need exist for an improved ergonomic keyboard thatmaintains the wrists and elbows in a more natural position and that maybe picked up by a QWERTY trained typist without having to change theirtyping style or the angle of their finger throw when striking keys inadjacent rows.

SUMMARY OF THE INVENTION

[0014] The present invention is directed to an improved ergonomickeyboard designed to satisfy or at least diminish the aforementionedneeds. To this end, a plurality of keys are arranged on a mount in anumber of adjacent arcuate-shaped rows. At least two elongated keys arelocated in the arcuate portion of each row, and in order to provide aninterlocking arrangement between the rows, the elongation of theelongated keys is increased as the rows approach the user side of thekeyboard.

[0015] The arcuate arrangement of this invention allows the hands to beheld more directly in line with the forearms; thus, eliminating theproblem of the wrists being turned outward in the lateral plane.Further, the elongated keys in the arcuate portion of the boardeffectively increase the distance between the hands so that the arms areheld in a natural, relaxed position rather than being held in close tothe body. And while the keyboard arrangement of the present inventionmay be used for the usual QWERTY-keyboard arrangement, it is not solimited.

[0016] In another aspect of the present invention, the upper surface ofthe keyboard mount is made to slope downwardly in a direction away fromthe user side of the keyboard. The downward sloping typing surface maybe provided by directly molding it into the keyboard. More desirably,the keyboard may be provided with a wrist support pivotally attached tothe mount and support legs that are pivotally attached to the wristsupport. With this arrangement, the upper surface of the mount can bemade to slope downwardly in a direction away from the user by loweringthe legs on the wrist support.

[0017] The downwardly sloping configuration of the keyboard helpsprevent users from resting their wrists on the table, a commonoccurrence with fatigued typists. Furthermore, the wrist support, incombination with the downward slope of the keyboard, prevents users fromcocking their wrists in the vertical plane while typing.

[0018] In a preferred embodiment of the present invention, an ergonomickeyboard is provided having a plurality of keys arranged on a mount in anumber of adjacent arcuate-shaped rows. At least two elongated keys arelocated in the arcuate portion of each row, and in order to provide aninterlocking arrangement between the rows, the elongation of theelongated keys is increased as the rows approach the user side of thekeyboard. Furthermore, the upper surface of the keyboard mount is madeto slope downwardly in a direction away from the user side of thekeyboard. The downward sloping typing surface may be provided bydirectly molding it into the keyboard, or, preferably, the keyboard maybe provided with a wrist support pivotally attached to the mount andsupport legs that are pivotally attached to the wrist support. With thesecond arrangement, the upper surface of the mount may be made to slopedownwardly in a direction away from the user by lowering the legs on thewrist support.

[0019] In this preferred embodiment, the keyboard achieves theadvantages of both the arcuate-shaped keyboard and the downwardlysloping keyboard discussed above.

[0020] Accordingly, it is an object of the invention to provide animproved ergonomic keyboard.

[0021] Other novel features that are characteristic of the invention, asto organization and method of operation, together with further objectsand advantages thereof will be better understood from the followingdescription considered in connection with the accompanying drawings inwhich the embodiments of the present invention are illustrated by way ofexample. It is to be expressly understood, however, that the drawingsare for the purpose of illustration and description only and are notintended as limitations on the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022]FIG. 1 is a partial top plan view of a preferred keyboard of theinvention.

[0023]FIG. 2 is a left end view of the preferred keyboard shown in FIG.1 with support legs in the down position.

[0024]FIG. 3 is a left view of the preferred keyboard in FIG. 1 withsupport legs in the up position.

[0025]FIG. 4 is a second embodiment of the keyboard shown in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Keyboard arrangements of the present invention are adapted to beused at normal typing stations of suitable height without specialrecesses. Furthermore, the arrangement of keys of the present inventionpermits the hands, wrists, elbows and shoulders to be maintained inergonomically advantageous orientations.

[0027]FIG. 1 shows the preferred proportions and relative sizes of theadvantageous keyboard arrangement according to the present embodiment.Referring to FIG. 1, Keyboard 10 comprises several distinct groups ofkeys. Each group of keys is supported on the keyboard mount 12. Mount 12may be made from metal or plastic. Plastic, however, is the preferredconstruction material because it is less expensive and easy to mold.

[0028] The alphanumeric key group 14 is located to the left side ofkeyboard 10. On the right side of keyboard 10 is located a main cursorgroup 16 and a numeric/cursor keypad group 18. The numeric/cursor keypadgroup 18 is located to the right of the main cursor group 16.

[0029] Cursor group 16 is made up of an area-by-area cursor movementsubset 20 and a space-by-space movement subset 22. Also, as is wellknown in the art, insert (Ins) and delete (Del) keys are added to thearea-by-area subset.

[0030] A computer function key group 24 (or “function key” row) islocated across the top of the keyboard 10. The function key group can begenerally arranged in an arcuate shape similar to that of thealphanumeric key group 14 as illustrated in FIG. 1. Alternatively, thefunction keys can be arranged in a straight-line across the top of thekeyboard 10.

[0031] The alphanumeric indicia on the keys in group 14 are arranged inthe common QWERTY pattern, which is well known in the art. Thus, otherthan the arcuate shape in the center portion of the alphanumeric keygroup 14, the general configuration of the keyboard is similar to thatwhich is commonly referred to as an enhanced computer keyboard, whichincludes the typical a, b, c, . . . and 1, 2, 3, . . . keys, functionkeys, cursor keys, a keypad, and the other keys commonly used as part ofa computer terminal. Some of the other keys that are typically includedin the enhanced computer keyboard, as is well known in the art, areillustrated in FIG. 1. Examples include Print Screen (Prt Scn), ScrollLock (Sc Lk), Pause (Pas), and Escape (Esc). Obviously, however,keyboard 10 may include as many or as few keys as desired for theparticular circumstances.

[0032] Every key on keyboard 10 is connected to a means for electricallysignaling the computer, word processor or electric typewriter the keythat has been struck. The means for creating the electrical signal andthe means for connecting the keys to mount 12 are well known in the artand need not be described herein.

[0033] The alphanumeric group 14 basically comprises 58 keys: 10 numerickeys, 26 alphabetical keys, one for each letter of the alphabet, and 22miscellaneous keys. The 22 miscellaneous keys include keys forpunctuation and such controls as Shift, Space, Tab, Control (Ctrl),Alternate (Alt) and the like.

[0034] Key 46, which is the 2 key, is typical of the majority ofalphanumeric keys. It has a rectangular (or square) base perimeter 50.The base perimeter 50 tapers upwardly to a slightly concave uppersurface 48 of reduced size. The general shape of the key is a truncatedpyramid or an irregular truncated pyramid depending on whether all foursides of the key taper upwardly or only three of the four sides taperupwardly to upper surface 48. Both of these shapes, however, are knownin the art.

[0035] Alphanumeric group 14 consists of four unbroken rows, one numericand three alphabetic. Numeric row 26 contains the arabic numerals andsome punctuation and symbol keys. The three alphabetic rows comprise afirst or “top” row 28, a second or “home” row 30, and a third or“bottom” row 32.

[0036] Each unbroken row of keys is comprised of an arcuate portion 34,a left portion 36, and a right portion 38. The left and right portionsextend tangentially from the left and right sides of the arcuateportion, respectively. The angle θ in FIG. 1 represents the lateralcurvature of the arcuate portion of the keyboard. Preferably, θ is 35°.

[0037] The arcuate portion of each row is convex to the user side of thekeyboard and is comprised of at least two elongated keys 40. In theQWERTY design of the present embodiment, the elongated keys are namely,the 6 and 7 in the “numeric” row, the T and Y in the “top” row, the Gand H in the “home” row, and the B and N in the “bottom” row.

[0038] Elongated keys 40 have a rectangular base perimeter, which iswider than that for the typical alphanumeric key 46. The rectangularbase perimeter tapers upwardly to a slightly concave upper surface 54 ofa reduced size as with key 46. Thus, other than the width, thedimensions of elongated keys 40 and alphanumeric key 46 are the same.similarly, the angle at which the base perimeter tapers upwardly to theupper surface of reduced size is identical.

[0039] Alternatively, elongated keys 40 can be shaped such that the baseperimeter and upper surface have a trapezoid shape or an arcuate shape.The advantage of these shapes is that the gaps between adjacent keys inthe same row are kept as small as possible. This is because the gap 56formed by adjacent keys in the arcuate portion of the rows isrectangular. Whereas, when elongated keys 40 have a rectangularly shapedbase perimeter, the gap between adjacent keys in the arcuate portion ofthe board is triangularly shaped, as illustrated in FIG. 1, thusallowing slightly larger foreign objects to enter the area beneath thekeys.

[0040] These shapes are still much simpler, and thus cheaper tomanufacture, than the chevron shaped keys and the irregular trapezoidshaped keys required for existing V-shaped boards having interlockingrows.

[0041] The elongation of the elongated keys 40 increases as the rowsapproach the user side of the keyboard 10. Therefore, the elongation ofelongated keys 40 in the “bottom” row is greater than that of theelongated keys in the “home” row, “top” row, or “numeric” row.

[0042] Increasing the elongation of elongated keys 40 as the rowsapproach the user side of the keyboard provides several benefits.

[0043] First, the key stagger between adjacent rows can be maintainedsubstantially similar to that of a standard QWERTY keyboard, which alsomeans that the key stagger is symmetrical on the left and right sides ofthe keyboard. The only area where there is a slight change in the keystagger is the arcuate portion of the keyboard. However, because thekeys in this portion of the board are all operated by the index fingers,the most agile of all the fingers, operators will experience nodifficulty locating or striking these keys. QWERTY-typist, therefore,will find the distance and angle of finger throw substantially identicalto that of the standard keyboard, and most will experience immediatetactile familiarity with the keyboard according to the presentinvention. Accordingly, the keyboard according to the present embodimentis an acceptable substitute in the work place because no additionaltraining is required.

[0044] Second, the elongated keys in the arcuate portion of the keyboardeffectively increase the distance between the hands. As a result, thearms are held in a more natural, relaxed position than when using astandard keyboard or existing chevron boards having interlocking rows.Operators of these prior art keyboards tend to hold their elbows inclose to the body. Whereas, the elbows are naturally held out away fromthe body with keyboards according to the present embodiment. Thisfacilitates ergonomic movement of the arms when striking distant keys.Distant computer keys should be reached by moving the entire arm,starting from the shoulders, rather than by twisting the wrists orstraining the fingers. However, if the elbows are held in close to thebody, the operator's own girth is more likely to hinder proper movementwhen striking distant keys.

[0045] At the bottom of the arcuate-shaped rows is a space bar key 42having an arcuate-shape matching that of the arcuate-shaped rows ofalphanumeric key group 14. Opposed pairs of Ctrl and Alt keys are ateach end of the space bar key 42. The space bar key 42 plus the otherkeys in the same row as the space bar form the “space bar” row 44.

[0046] In the preferred embodiment of the present invention, a wristsupport 60 is pivotally attached to mount 12 of keyboard 10 by a pair ofhinges 58, and as shown in FIG. 2, a pair of retractable support legs 64are pivotally attached to wrist support 60. Furthermore, as also shownin FIG. 2, when support legs 64 are in a down position, the uppersurface 62 of mount 12 slopes downwardly in a direction away from theuser. However, as shown in FIG. 3, when the retractable support legs arein the up position, mount 12 lies flat on the typing surface.“Stilt-legs,” which are commonly located on the bottom of standardcomputer keyboards and which flip up or down to raise and lower theangle at which one types, may be used for legs 64.

[0047] The angle α in FIG. 2 represents the angle at which the uppersurface 62 slopes downwardly. When support legs 64 are in the downposition, the upper surface 62 of mount 12 should slope downwardly at anangle from approximately 5° to 40°. Preferably the downward slope shouldrange from approximately 15° to 25°.

[0048] The downwardly sloping configuration of the keyboard helpsprevent users from resting their wrists on the table, a commonoccurrence with fatigued typists. Furthermore, the wrist support incombination with the downward slope of the keyboard, prevents users fromcocking their wrists in the vertical plane while typing. As a result,the sensitive tendons, ligaments, and nerves that run through the narrowconfines of the wrist remain in their natural position and are notcompressed or irritated while typing. This greatly reduces thelikelihood that the operator will be afflicted with a repetitive stressinjury when typing for long periods of time.

[0049] An alternative embodiment is illustrated in FIG. 4. In thisembodiment, the downwardly sloping upper surface 62 is directly moldedinto mount 12. Thus, the angle at which the keyboard slopes downwardlyaway from the user is permanently fixed.

[0050] As with FIG. 2, the angle a represents the angle at which theupper surface 62 of mount 12 slopes downwardly. The upper surface 62 ofmount 12 should slope downwardly at an angle from approximately 5° to40°. Preferably the downward slope should range from approximately 15°to 25°.

[0051] Wrist support 66 is positioned adjacent to the keyboard on thehigh side of the downwardly sloping mount 12, which is also the userside of the keyboard. Wrist support 66 can be manufactured separate frommount 12 or it can be molded directly into mount 12.

[0052] An advantage of the embodiment depicted in FIGS. 2 and 3 over theone shown in FIG. 4 is its compact nature. Thus, the preferredembodiment shown in FIGS. 2 and 3 is more appropriate for portable andlaptop computers.

[0053] Standard QWERTY keyboards can also be manufactured with adownwardly sloping upper surface. Of course, such keyboards would notachieve the additional ergonomic benefits derived form having anarcuate-shaped keyboard.

[0054] As illustrated in FIGS. 2 and 4, the concave stroking surface ofthe keys within a row lie in a common oblique plane that slopes upwardlyin a direction away from the user side of the keyboard. Each row of keysshould be sloped such that the back of the keys 31 are lower than thefront of the keys 33 in the adjacent row on the user side of thekeyboard. Furthermore, each row of keys should have an upward slopegreater than or equal to 0°, and the further a row of keys is from theuser side of the keyboard, the greater its upward slope should be. Thus,the upward slope of the keys in the “space bar” row 44 is less than theslope of the keys in the “bottom” row 32, “home” row 30, “top” row 28,“numeric” row 26 or “function key” row 24.

[0055] The angle at which a particular row of keys slopes upwardly ismeasured from the horizontal axis as illustrated by the angle β in FIGS.2 and 4. For the preferred embodiment illustrated in FIGS. 2 and 3, theslope of the keys is determined when the retractable support legs 64 arein the down position. The following is a list of the preferred angles atwhich each row of keys slopes upwardly: “space bar” row 44—0°; “bottom”row 32—3°; “home” row 30—6°; “top” row 28—6°; “numeric” row 2—9°; and“function key” row 24—15°.

[0056] Sloping the keys in this manner improves the angle of contactbetween the keys and the operator's fingers. Thus, an operator's fingersare less likely to miss the object key or to carom off one key intoanother. Error rates are thereby minimized.

[0057] While the principles of the invention have been made clear in theillustrative embodiments, there will be immediately obvious to thoseskilled in the art many modifications of structure, arrangement,proportions, the elements, materials, and components used in thepractice of the invention, and otherwise, which are particularly adaptedto specific environments and operative requirements without departingfrom those principles. Thus, it is to be clearly understood that thisdescription is made only by way of example and not as a limitation tothe scope of the invention as claimed below.

I claim:
 1. An ergonomic keyboard, comprising: a. a mount; b. aplurality of keys on said mount arranged in a plurality of unbrokenadjacent rows, each row comprised of an arcuate portion, a left portionand a right portion, said left and right portions extending tangentiallyfrom the left and right sides of the arcuate portion, respectively, andsaid arcuate portion of each unbroken row being convex to the user sideof the keyboard and comprising at least two elongated keys, theelongation of said elongated keys increasing as said plurality of rowsapproach the user side of the keyboard.
 2. An ergonomic keyboardaccording to claim 1, wherein two keys in the arcuate portion of eachunbroken concave row are elongated.
 3. An ergonomic keyboard accordingto claim 1, wherein the upper surface of said mount slopes downwardly ina direction away from the user side of the keyboard.
 4. An ergonomickeyboard according to claim 3, wherein the upper surface of said mountslopes downwardly from approximately 5° to 40° with respect to thehorizontal.
 5. An ergonomic keyboard according to claims 3, wherein theupper surface of said mount slopes downwardly from approximately 15° to25° with respect to the horizontal.
 6. An ergonomic keyboard accordingto claim 3, further comprising: a. a wrist support positioned adjacentto the keyboard on the high side of the downward slope.
 7. An ergonomickeyboard according to claim 1, further comprising: a. a wrist supportpivotally attached to said mount; and b. support legs pivotally attachedto said wrist support, wherein the upper surface of said mount slopesdownwardly in a direction away from the user when said support legs arein a down position.
 8. An ergonomic keyboard according to claim 7,wherein the upper surface of said mount slopes downwardly fromapproximately 5° to 40° with respect to the horizontal.
 9. An ergonomickeyboard according to claims 7, wherein the upper surface of said mountslopes downwardly from approximately 15° to 25° with respect to thehorizontal.
 10. An ergonomic keyboard, comprising: a. a mount; b. aplurality of keys arranged in four unbroken adjacent rows and having aQWERTY typing layout, each row comprised of an arcuate portion, a leftportion and a right portion, said left and right portions extendingtangentially from the left and right sides of the arcuate portion,respectively, and said arcuate portion of each unbroken row being convextoward the user side of the keyboard and comprising at least twoelongated keys, the elongation of said elongated keys increasing as saidunbroken rows approach the user side of the keyboard.
 11. An ergonomickeyboard according to claim 10 wherein two keys in the arcuate portionof each unbroken row are elongated, one key bearing the number 6 and onebearing the number 7 in one of said four rows, one key bearing theletter T and one bearing the letter Y in another of said four rows, onekey bearing the letter G and one bearing the letter H in another of saidfour rows, and one key bearing the letter B and one bearing the letter Nin another of said four rows.
 12. An ergonomic keyboard according toclaim 10, wherein the upper surface of said mount slopes downwardly in adirection away from the user side of the keyboard.
 13. An ergonomickeyboard according to claim 12, wherein the upper surface of said mountslopes downwardly from approximately 5° to 40° with respect to thehorizontal.
 14. An ergonomic keyboard according to claims 12, whereinthe upper surface of said amount slopes downwardly from approximately15° to 25° with respect to horizontal.
 15. An ergonomic keyboardaccording to claim 12, further comprising: a. a wrist support positionedadjacent to the keyboard on the high side of the downward slope.
 16. Anergonomic keyboard according to claim 10, further comprising: a. a wristsupport pivotally attached to said mount; and b. support legs pivotallyattached to said wrist support, wherein the upper surface of said mountslopes downwardly in a direction away from the user when said supportlegs are in a down position.
 17. An ergonomic keyboard according toclaim 16, wherein the upper surface of said mount slopes downwardly fromapproximately 5° to 40° with respect to the horizontal.
 18. An ergonomickeyboard according to claims 16, wherein the upper surface of saidamount slopes downwardly from approximately 15° to 25° with respect tohorizontal.
 19. An ergonomic keyboard, comprising: a. a mount; b. aplurality of keys on said mount arranged in a plurality of unbrokenadjacent rows, each row comprised of an arcuate portion, a left portionand a right portion, said left and right portions extending tangentiallyfrom the left and right sides of the arcuate portion, respectively, andsaid arcuate portion of each unbroken row being convex to the user sideof the keyboard and comprising at least two elongated keys, theelongation of said elongated keys increasing as said plurality of rowsapproach the user side of the keyboard; C. a wrist support pivotallyattached to said mount; and d. support legs pivotally attached to saidwrist support, wherein the upper surface of said mount slopes downwardlyaway from the user when said support legs are in a down position.
 20. Anergonomic keyboard according to claim 19, wherein two keys in thearcuate portion of each unbroken row are elongated.
 21. An ergonomickeyboard according to claim 19, wherein: said plurality of keys isarranged in four unbroken rows; and the keys in said four rows arearranged in a QWERTY typing layout.
 22. An ergonomic keyboard accordingto claim 21, wherein two keys in the arcuate portion of each unbrokenrow are elongated, one key bearing the number 6 and one bearing thenumber 7 in one of said four rows, one key bearing the letter T and onebearing the letter Y in another of said four rows, one key bearing theletter G and one bearing the letter H in another of said four rows, andone key bearing the letter B and one bearing the letter N in another ofsaid four rows.
 23. An ergonomic keyboard according to claim 19, whereinthe upper surface of the mount slopes downwardly from approximately 5°to 40° with respect to the horizontal when the support legs are in thedown position.
 24. An ergonomic keyboard according to claim 19, whereinthe upper surface of the mount slopes downwardly from approximately 15°to 25° with respect to the horizontal when the support legs are in thedown position.
 25. An ergonomic keyboard according to claims 19,wherein: the stroking surface of the keys within a row of said pluralityof rows lie in a common oblique plane that slopes upwardly in adirection away from the user; and each row of said keys has an upwardslope that is greater than or equal to 0° with respect to the horizontalwhen the support legs are in the down position.
 26. An ergonomickeyboard according to claim 25, wherein: the back of the keys in aparticular row of keys is lower than the front of the keys in theadjacent row on the user side of the keyboard; and the further a row ofkeys is from the user side of the keyboard, the greater its upwardslope.
 27. An ergonomic keyboard according to claims 23, wherein: thestroking surface of the keys within a row of said plurality of rows liein a common oblique plane that slopes upwardly in a direction away fromthe user; and each row of said keys has an upward slope that is greaterthan or equal to 0° with respect to the horizontal when the support legsare in the down position.
 28. An ergonomic keyboard according to claim27, wherein: the back of the keys in a particular row of keys is lowerthan the front of the keys in the adjacent row on the user side of thekeyboard; and the further a row of keys is from the user side of thekeyboard, the greater its upward slope.
 29. An ergonomic keyboardaccording to claims 24, wherein: the stroking surface of the keys withina row of said plurality of rows lie in a common oblique plane thatslopes upwardly in a direction away from the user; and each row of saidkeys has an upward slope that is greater than or equal to 0° withrespect to the horizontal when the support legs are in the downposition.
 30. An ergonomic keyboard according to claim 29, wherein: theback of the keys in a particular row of keys is lower than the front ofthe keys in the adjacent row on the user side of the keyboard; and thefurther a row of keys is from the user side of the keyboard, the greaterits upward slope.
 31. An ergonomic keyboard, comprising: a. a mount; b.a plurality of keys located on said mount and arranged in a plurality ofadjacent rows; c. a wrist support pivotally attached to said mount; andd. support legs pivotally attached to said wrist support, wherein theupper surface of said mount slopes downwardly away from the user whensaid support legs are in a down position.
 32. An ergonomic keyboardaccording to claim 31, wherein the upper surface of said mount slopesdownwardly from approximately 5° to 40° with respect to the horizontal.33. An ergonomic keyboard according to claim 31, wherein the uppersurface of said mount slopes downwardly from approximately 15° to 25°with respect to the horizontal.
 34. An ergonomic keyboard according toclaim 31, wherein: the stroking surface of the keys within a row of saidplurality of rows lie in a common oblique plane that slopes upwardly ina direction away from the user; and each row of said keys has an upwardslope that is greater than or equal to 0° with respect to the horizontalwhen said support legs are in the down position.
 35. An ergonomickeyboard according to claim 34, wherein: the back of the keys in aparticular row of keys is lower than the front of the keys in theadjacent row on the user side of the keyboard; and the further a row ofkeys is from the user side of the keyboard, the greater its upwardslope.
 36. An ergonomic keyboard according to claim 32, wherein: thestroking surface of the keys within a row of said plurality of rows liein a common oblique plane that slopes upwardly in a direction away fromthe user; and each row of said keys has an upward slope that is greaterthan or equal to 0° with respect to the horizontal when said supportlegs are in the down position.
 37. An ergonomic keyboard according toclaim 36, wherein: the back of the keys in a particular row of keys islower than the front of the keys in the adjacent row on the user side ofthe keyboard; and the further a row of keys is from the user side of thekeyboard, the greater its upward slope.
 38. An ergonomic keyboardaccording to claim 23, wherein: the stroking surface of the keys withina row of said plurality of rows lie in a common oblique plane thatslopes upwardly in a direction away from the user; and each row of saidkeys has an upward slope that is greater than or equal to 0° withrespect to the horizontal when said support legs are in the downposition.
 39. An ergonomic keyboard according to claim 38, wherein: theback of the keys in a particular row of keys is lower than the front ofthe keys in the adjacent row on the user side of the keyboard; and thefurther a row of keys is from the user side of the keyboard, the greaterits upward slope.